xfs: move eofblocks conversion function to xfs_ioctl.c

Move xfs_fs_eofblocks_from_user into the only file that actually uses
it, so that we don't have this function cluttering up the header file.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index d58f0d6a699e..ad4c7eedda3d 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -2093,6 +2093,41 @@ out:
 	return error;
 }
 
+static inline int
+xfs_fs_eofblocks_from_user(
+	struct xfs_fs_eofblocks		*src,
+	struct xfs_eofblocks		*dst)
+{
+	if (src->eof_version != XFS_EOFBLOCKS_VERSION)
+		return -EINVAL;
+
+	if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
+		return -EINVAL;
+
+	if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
+	    memchr_inv(src->pad64, 0, sizeof(src->pad64)))
+		return -EINVAL;
+
+	dst->eof_flags = src->eof_flags;
+	dst->eof_prid = src->eof_prid;
+	dst->eof_min_file_size = src->eof_min_file_size;
+
+	dst->eof_uid = INVALID_UID;
+	if (src->eof_flags & XFS_EOF_FLAGS_UID) {
+		dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
+		if (!uid_valid(dst->eof_uid))
+			return -EINVAL;
+	}
+
+	dst->eof_gid = INVALID_GID;
+	if (src->eof_flags & XFS_EOF_FLAGS_GID) {
+		dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
+		if (!gid_valid(dst->eof_gid))
+			return -EINVAL;
+	}
+	return 0;
+}
+
 /*
  * Note: some of the ioctl's return positive numbers as a
  * byte count indicating success, such as readlink_by_handle.